There are plans for a Supercharger in Bakersfield proper along SR99, just a stone's throw north of Tejon Ranch, as it were. I do not know how many people who use Tejon Ranch take 99 (like me) as opposed to 5, but certainly when Bakersfield opens that will further reduce the stress on Tejon Ranch. Right now it is imperative for me to stop at Tejon Ranch heading home from the Los Angeles area unless I wish to detour onto Interstate 5. Heading south, it appears to be dicey to try to reach Sta. Clarita (although I will try to next fall when I head south.)
In addition, Santa Barbara and Ventura owners who desire to go avoid the LA metropolitan area can reach the Grapevine at Castaic Jct. (SR126) on Interstate 5 then head north to their destinations. They too must stop at Tejon Ranch now.
Then there is the minority of owners from the Central Coast area who take SR166 east from Sta. Maria to reach Barstow for trips to Vegas or northern Arizona. Today they must detour south to Tejon Ranch before continuing through the bustling metropolis of Arvin and climb on SR229 to SR58 to continue their eastward journey. The putative Bakersfield Supercharger will avoid this detour as well.
While a Supercharger on the east side of Interstate 5 would be a welcome addition, I do not foresee a major issue at the extant location within 2-4 years once Bakersfield proper is open.(*) But then, too, my crystal ball has been known to become hazy and fall off the table.
(*) Much will depend upon the ultimate location of this Supercharger. If it is north of the junction with SR58 along SR99, Tejon Ranch might be more convenient and have more options available. We shall see!